单选题According to the passage, cell phones were launched _____.Ain the late 1970sBbetween 1980 and 1985Cin the late 1980sDin the early 1990s
单选题
According to the passage, cell phones were launched _____.
A
in the late 1970s
B
between 1980 and 1985
C
in the late 1980s
D
in the early 1990s
参考解析
解析：
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